JP3106206U - A device that blocks birds from entering the jet engine and removes birds from the intake area - Google Patents

Abstract

An object of the present invention is to provide a device that not only blocks birds at an intake port but also eliminates birds from an intake area in order to ensure sufficient intake even after a bird collides with an engine.
A hemispherical metal cover provided with a vent is installed in front of an intake port of an engine to block birds from colliding with the engine and to rotate the cover at a high speed so that birds can be removed from the cover. To eliminate. The rotation 11 of the intake fan of the engine is transmitted to the rotation axis of the cover via the reduction gear group 5, and the high-speed rotation of the cover causes strong centrifugal force and strong airflow to fly the colliding bird out of the cover.
[Selection diagram] Fig. 1

Description

This device relates to a device that prevents birds from being sucked into the engine during the flight of a jet aircraft and removes birds from the engine intake.

At present, jet aircraft draws air directly through the engine intake port by the intake fan, so if a bird enters the orbital area of the engine, it is expected that the bird will collide with the intake fan or combustion chamber. If a net-shaped cover is installed in front of the engine intake to protect the engine, the intake area will be significantly reduced due to bird collision. In addition, birds are not eliminated due to strong intake pressure, and bird strike measures for jet aircraft are mainly promoted by improving the strength of intake fans.

In recent years, with the spread of jet aircraft and the increase in airports, the risk of accidents and troubles due to birds entering through the engine intake has increased. The mainstream jet aircraft currently in use installs an intake fan at the front of the engine, inhales and compresses the air in front of the aircraft at high pressure, sends it to the combustion engine, and achieves high-speed flight. When the bird enters the flight trajectory of the engine part of the airplane, it is sucked into the engine by the intake fan and airflow. If such an accident occurs, damage to the engine, such as damage to the intake fan or compressor, will be large, and large amounts of repair costs, as well as crashes, may endanger the occupants' lives. In order to drastically solve this problem and ensure sufficient intake even after a bird collision, it is essential to block birds at the intake and remove birds from the intake area.

In order to solve this bird problem, the present invention attaches a hemispherical metal cover provided with a number of vents that rotate around the rotation axis to the front of the intake port of all engines of the jet. As shown in FIG. 1, the cover outer wall plate is fixed to a rotating shaft via a frame, the rotating shaft of the cover is attached to a rotating shaft of an intake fan of the engine via a group of reduction gears, and the cover is connected to the rotating shaft. It is designed to rotate around the center.

When a bird's collision with the cover is detected by a pressure sensor installed on the rotating shaft of the cover, the rotation of the engine's intake fan is immediately transmitted to the rotating shaft of the cover by an actuator using electromagnets. Then, the cover rotates at a high speed, and the bird is blown out of the cover by the strong centrifugal force and the strong airflow behind the aircraft. This eliminates birds from the intake area, ensures sufficient intake even after a bird collision, and realizes a safe flight.

The following specifications and designs maintain the conventional intake efficiency and reduce the risk of bird problems. The use of a hemispherical cover with numerous vents makes it possible to secure the intake of the engine without significant loss. The outer wall plate of the cover is manufactured by stamping, for each block divided into four, assembled with rivets, etc., and fixed to the rotating shaft via a frame.

The adoption of a hemispherical cover with a number of vents makes it possible to block birds from entering the engine intake. Compared to the case where a flat circular grid is installed at the jet engine inlet, the hemispherical cover can secure a larger intake area (about twice), so that one bird collides and the intake area becomes smaller. Even if it decreases, it is possible to secure intake from other areas.

At the time of a bird collision, the rotation of the intake fan is linked to the rotation of the cover, so that the birds fly out of the cover by centrifugal force due to the rotational movement of the cover to secure the air intake. Here, using the high-speed rotation of the intake fan, it is linked to the rotation of the cover via a group of reduction gears.

By incorporating a sensor that senses pressure from the front of the engine to the cover at the joint between the cover and the engine rotation axis, birds' collision is detected by analyzing the waveform pattern of the pressure change, and high-speed rotation of the rotation axis of the fan is achieved. Immediately transmit the rotation of the cover by an electromagnetic actuator. By this centrifugal force and airflow, birds are bounced out of the cover to secure an intake area.

By adopting a hemispherical shape so that the radius from the rotating shaft to the outer circumference becomes larger from the tip of the cover to the rear of the engine, the bird that collides with the tip with the largest air resistance will have centrifugal force and The strong wind pressure pushes it towards the hemispherical rear. In the rear part of the hemisphere, the birds bounce out of the cover due to the stronger centrifugal force and wind pressure.

When the bird does not collide, the rotation of the engine intake fan is not transmitted to the rotation of the cover because the actuator is not operating, so the load and load on the engine is reduced. The adoption of a light and hard metal plate reduces the weight of the cover and reduces the structural burden on the engine.

The high-speed rotation of the cover generates a spiral airflow from the tip of the cover, and uses this, centrifugal force, and airflow to the rear of the aircraft to fly the bird out of the cover.

Assuming that a bird collides with the cover and scatters on a small bone fragment, it is possible to create a double block by installing a fine grid-like plate made of a finer grid as shown in Fig. 1.

By using an electromagnet for the actuator, it is possible to control the transmission rate to the cover shaft in multiple stages of the rotation speed of the engine rotation shaft. It is also possible to control the transmission rate to the cover in consideration of the output balance of the engine that the bird collided with the other engine.

Fig. 1 shows an embodiment.
It is also possible to keep the cover rotating at all times by connecting the cover to the rotation axis of the intake fan without using a sensor. The cover can be rotated at all times during the flight as well as during takeoff and landing near the airport. In addition, by connecting the altimeter to the computer, it is possible to automatically rotate the cover when the altitude at the time of takeoff and landing with a high risk of bird strike (problem of intake from the bird engine).

The structure of this device is shown in cross section. The structure of this device is shown in a front view.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Cover outer wall slab 2 Frame 3 Cover rotating shaft 4 Tip 5 Reduction gear group 6 Fine grid-like plate 7 Engine front 8 Frame 9 Intake fan 10 Low pressure compressor 11 Intake fan rotation shaft

Claims (1)

A hemispherical metal rotating cover with a large number of vents is installed in front of the intake port of the engine, and the rotation of the rotating shaft of the engine's intake fan is connected to the rotation of the cover via a group of reduction gears. By rotating the at high speed, birds that collided with the cover are eliminated by centrifugal force and airflow to secure air intake.

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